possibilities are endless, here's what I do to address them:
https://www.rctech.net/forum/showpos...ostcount=12161
Originally Posted by Bill DeLong
Here's what I like to do to diagnose problems
1) If you made any changes to your ESC programming, then I would reset everything back to factory default. Also reset the radio if necessary, follow the calibration directions very carefully and pretend like this is a fresh install... re-calibrate the ESC. If the ESC loses calibration frequently then you might have a bad radio, potentiometer may need to be replaced on the throttle, etc... swap radio with a known good radio to test. Also check all wiring is clean and tight, any loose connections can be problematic, sometimes it's worth the effort to re-solder everything just to have nice fresh connections to play it safe
2) If problem persists then: Swap sensor wire with a known good wire
3) If problem persists then: Use a sensor tester to verify motor sensor board is good
4) If problem persists then: Pull out motor and disassemble, inspect rotor for any damage (cracked magnets, etc)
5) If problem persists then: Swap motor with a known good motor
6) If problem persists then: Swap ESC with a known good ESC
*** very important to swap motor first... a bad motor can kill a good ESC... been there done that!
*** generally, most issues are motor related... sometimes a sensor wire connector goes bad, a hard crash can take out a sensor board, an overheated motor can burn up a stator and any debris in the motor can damage a rotor... sometimes ESC's can get finicky if they are over heated or damaged from a bad crash or hard landing from a big jump, Kyosho sells an impact resistant gel-tape that is good to help absorb shock, I also use a zip tie to secure the ESC firmly over the fan mount... but over time almost all ESC's will start to glitch after too many hard impacts. Best advice is to drive clean and always land smooth on the down ramps to avoid hard chassis slaps!
*** Mysterious Issue resolved: ESC shuts off when applying throttle or steering input